I DM a party;
Savage Technologist - for me this class isn't quite balanced but heho its good, I do think the access to ALL firearms is a bit too good.
Investigator - Good class ideal for the adventure, but lacking in combat sometimes
Bard - Well never my favourite but seems ok for once
Gunslinger (Musket Master) - I am still not used to the touch AC bit....
Druid - I banned Clerics and Divine Archetypes so this is the best they were allowed :)
Sorcerer - New player..
We have six which offsets the no Cleric rule but its fun letting them run around with ability drain and negative levels :)